Re: [boost] _ReadWriteBarrier as memory fence, or not?

From: Anthony Williams (anthony.ajw_at_[hidden])
Date: 2008-08-22 04:38:52

"Simon Thornington" <simon.thornington_at_[hidden]> writes:

> Ok, thanks.  Is it fair to say that these MSVC macros are assuming x86
> architecture?  Would this code still be safe on IA?  (I don't personally
> have to deal with Itanium, I'm just curious now).

The Microsoft docs for the latest versions of their compiler say that
volatile reads have a acquire semantics, so it should be fine. At the
assembly language level, you do need a ld.acq instruction though
rather than a simple ld. I haven't checked whether the compiler does
this.

Anthony
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